Red wool dyestuffs and process of making same.



nsan rne OTTO VIU'ZLFF, 0F HijCI-ZST-ON-THE-MAIN, GERMANY, ASSIGNOR T0 F'ARBWEBKE VGRM.

MEIS'JZER LUCIUS d: BHTTNING, OF HZfiCHST-ONF-THE -IMAIN, GERMANY, A CORPORA- TIQN 0F GERMANY.

nan wconnri ns'rUe-es AND Pnocnss OF MAKING SAME.

No Drawing.

To all whom it may concern:

Be it known that I, @cero WULFF, Ph. 1)., chemist, a citizen of the Empire of Germany, residing at Hochst-on-the-Main, Germany, have invented certain new vanduseful Improvements in Red Wool Dyestuffs and Processes of Making Same, of which the following is a specification.

I have found that a scarlet-red acid dyestufi is obtained by causing diazotized orthoanilin-sulfonic acid to act upon-2-amino-8- naphthol-B-sulfonic acid in acid solution.

The dyestufi' thus produced is distinguished not only by the beautiful tint it yields, but also by its excellent property of dyeing evenly and its eminent fastness tolight.

The following eXample'illustra-tes my invention: 17.3 kilos of ortho-anilin-sulfonic acid are diazotized in the usual manner. After the diazotization is complete, there is added a suspension, acidified with a mineral acid, of 24 kilos of Q-amino-8-naphthol-6-suL fonic acid, whereupon the mineral-acid reaction is gradually neutralized by adding sodium acetate accordingly as the coupling process proceeds. When the coupling is finished, the mass is rendered alkaline and the dyestufl which in this case has the composition F ,E {\NHE I P8031 being a red powder, readily soluble in water,

{I Specification of Lette rsPatentu Patented Application filedflctober 17, 1914. Serial No. 867,196.

Sept. 28, 1915.

Having now described my invention, what I claim is:

1. As new products, the dyestufis of the formula: v

wherein )1 stands for a metal, being red powders, readily soluble in water, very little soluble in alcohol, insoluble in ligroin and petroleum and dyeing wool in an acid bath red tints of great fastne'ss to light.

2. As a new formula:

In testimony whereof I aflix my signature in presence of two witnesses.

OTTO WULFF.

Witnesses:

JEAN GRUND, CARL GRUND.

product, the dyestufi of the g 

